(function() {
    'use strict';
    window.addEventListener('load', function() {
        // Fetch all the forms we want to apply custom Bootstrap validation styles to
        var forms = document.getElementsByClassName('needs-validation');
        // Loop over them and prevent submission
        var validation = Array.prototype.filter.call(forms, function(form) {
            form.addEventListener('submit', function(event) {
                if (form.checkValidity() === false) {
                    event.preventDefault();
                    event.stopPropagation();
                }
                form.classList.add('was-validated');
            }, false);
        });
    }, false);
})();

function validateRegister() {
    var form = document.forms["credentials"];
    var pass = form["password"].value;
    var cpass = form["rePassword"].value;
    if (pass === cpass) {
        return true;
    }
    alert("密码与确认密码不同！");
    return false;
}